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Ternary magnetic composite photocatalytic nanomaterial and preparation method and use thereof

A technology of composite photocatalysis and nanomaterials, which is applied in the field of ternary magnetic composite photocatalysis nanomaterials and their preparation, can solve the problems of expensive recycling of Ag-based materials, and improve the separation efficiency of electrons and holes and the absorption and utilization of light. rate, improve the photocatalytic degradation effect, and the effect of simple synthesis method

Inactive Publication Date: 2017-05-31
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, Ag-based materials in the above reports are relatively expensive and have poor recyclability.

Method used

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  • Ternary magnetic composite photocatalytic nanomaterial and preparation method and use thereof
  • Ternary magnetic composite photocatalytic nanomaterial and preparation method and use thereof
  • Ternary magnetic composite photocatalytic nanomaterial and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1. Preparation of g-C 3 N 4 Photocatalyst: Take 6g of purchased melamine and place it in a crucible, place it in a muffle furnace, and calcine it in an air atmosphere, raise the temperature to 550°C at a heating rate of 3°C / min, and keep it at a constant temperature for 2 hours. Continue to raise the temperature to 620°C, keep at constant temperature for 2h, cool down to room temperature naturally and grind finely to obtain g-C 3 N 4 Photocatalyst, save for future use.

[0035] Step 2, disperse 0.25g sodium tungstate and 0.15g oxalic acid in 40ml deionized water and stir, then use HCl (hydrochloric acid concentration is 2.0mol L -1 ) to adjust the pH of the above solution to 1, stir for 40 minutes, and finally transfer it to a 50ml stainless steel high-temperature reactor, raise the temperature to 120°C for 10h, dry it, and then transfer it to a muffle furnace for calcination at 500°C for 2h.

[0036] Step 3, add 1.0g g-C 3 N 4 ,0.2g Fe(NO) 3 9H 2 O, 0.15g ...

Embodiment 2

[0038] Step 1. Preparation of g-C 3 N 4 Photocatalyst: Take 3g of melamine in a crucible, place it in a muffle furnace, and calcine it in an air atmosphere, raise the temperature to 500°C at a heating rate of 1°C / min, and keep it at a constant temperature for 2 hours, and continue at the same heating rate Raise the temperature to 600°C, keep it at a constant temperature for 2 hours, cool down to room temperature naturally and grind it finely to obtain g-C 3 N 4 Photocatalyst, save for future use.

[0039] Step 2, disperse 0.1g sodium tungstate and 0.1g oxalic acid in 30ml deionized water and stir, then use HCl (hydrochloric acid concentration is 2.0mol L -1 ) Adjust the pH of the above solution to 1, stir for 30 minutes, and finally transfer it to a 50ml stainless steel high-temperature reactor, raise the temperature to 120° C. for 10 hours, and then calcine in a muffle furnace at 400° C. for 2 hours after drying after the reaction.

[0040] Step 3, 0.5g C 3 N 4 ,0.1g Fe...

Embodiment 3

[0042] Step 1. Preparation of g-C 3 N 4 Photocatalyst: Take 10g of melamine in a crucible, then place it in the muffle furnace for calcination in the air atmosphere, raise the temperature to 550°C at a constant temperature of 5°C / min for 2 hours, then continue to heat up to a constant temperature of 650°C at the same heating rate 2h, naturally cool to room temperature after the completion of the reaction, the obtained g-C 3 N 4 Grind the powder finely and save it for later use.

[0043] Step 2, disperse 0.3g sodium tungstate and 0.2g oxalic acid in 50ml deionized water and stir, then use HCl (hydrochloric acid concentration is 2.0mol L -1 ) Adjust the pH of the above solution to 1, stir for 50 minutes, and finally transfer it to a 50ml stainless steel high-temperature reaction kettle, raise the temperature to 120°C for 10 hours, and then calcine in a muffle furnace at 600°C for 2 hours after drying after the reaction.

[0044] Step 3, 1.5g C 3 N 4 ,0.3g Fe(NO) 3 9H 2 O...

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Abstract

The invention provides a ternary magnetic composite photocatalytic nanomaterial and a preparation method and use thereof. The preparation method comprises the following steps: step 1, preparing a g-C3N4 photocatalyst; step 2, preparing WO3; and step 3, preparing the ternary magnetic composite photocatalytic nanomaterial. In the ternary magnetic composite photocatalytic nanomaterial prepared in the invention, the g-C3N4 photocatalyst is a novel organic visible-light-activated photocatalyst, and the Fe3O4 nanoparticles have excellent magnetism and electric conductivity. In addition, the WO3 as an inorganic semiconductor with good visible-light response has a band gap structure matching the g-C3N4. Therefore, according to the valence band theory and as reported in literatures, the WO3 can form a Z-type heterojunction photocatalyst having high photocatalytic activity with the g-C3N4. The composite material of such a special structure has improved photocatalytic effect such that the ternary magnetic composite photocatalytic nanomaterial prepared in the invention has excellent stability and photocatalytic degradation effect.

Description

technical field [0001] The invention relates to a composite photocatalyst, in particular to a ternary magnetic composite photocatalytic nano material and its preparation method and application. Background technique [0002] As we all know, antibiotics are commonly used drugs for treating infectious diseases. They were used clinically in 1941. It can be said that antibiotics are the greatest medical discovery in the 20th century. It has extended the average life span of human beings by at least 10 years. As a drug with inhibitory or killing effect, antibiotics can inhibit and kill bacteria, fungi, and tumors to a certain extent. Because of the spectrum and special properties of antibiotics, the abuse of antibiotics in most countries is increasing. In recent years, the abuse of antibiotics has not only led to bacterial resistance and seriously threatened human health, but also a series of ecological effects of antibiotic residues in the environment and their fate on human hea...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30
CPCC02F1/30B01J27/24C02F2305/10B01J35/33B01J35/40B01J35/39
Inventor 朱志于洋唐旭逯子扬霍鹏伟闫永胜李春香
Owner JIANGSU UNIV
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